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From "Phil Steitz (Commented) (JIRA)" <j...@apache.org>
Subject [jira] [Commented] (MATH-699) inverseCumulativeDistribution fails with cumulative distribution having a plateau
Date Sun, 06 Nov 2011 06:12:51 GMT

    [ https://issues.apache.org/jira/browse/MATH-699?page=com.atlassian.jira.plugin.system.issuetabpanels:comment-tabpanel&focusedCommentId=13144933#comment-13144933
] 

Phil Steitz commented on MATH-699:
----------------------------------

Be careful eliminating the bracketing step.  IIRC it is in there to resolve a bug involving
some corner case.  In theory, the unit tests should pick up any regressions, but it would
be a good idea to review the commit logs and issue reports for this class before ripping out
the bracketing step.
                
> inverseCumulativeDistribution fails with cumulative distribution having a plateau
> ---------------------------------------------------------------------------------
>
>                 Key: MATH-699
>                 URL: https://issues.apache.org/jira/browse/MATH-699
>             Project: Commons Math
>          Issue Type: Bug
>    Affects Versions: 3.0
>            Reporter: S├ębastien Brisard
>            Assignee: S├ębastien Brisard
>            Priority: Minor
>         Attachments: AbstractContinuousDistributionTest.java
>
>
> This bug report follows MATH-692. The attached unit test fails. As required by the definition
in MATH-692, the lower-bound of the interval on which the cdf is constant should be returned.
This is not so at the moment.

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